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Derivative Instruments - Derivatives Not Designated as Hedging Instruments (Details) $ in Thousands |  |  | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 16, 2018 EUR (€) | Dec. 20, 2013 AUD ($) loan | Mar. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) swap | Dec. 31, 2017 EUR (€) swap | Jan. 31, 2014 AUD ($) | Dec. 31, 2010 USD ($) swap
Derivative [Line Items] |  |  |  |  |  |  |
Fair value of derivative assets |  |  | $ 41,341 | $ 48,186 |  |  |
Lines of credit | Term Loan Two | Syndicated Facility Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Borrowing under credit facility |  | $ 22,500,000 |  |  |  |  |
THINK | Lines of credit | Term Loan | Syndicated Facility Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Borrowing under credit facility |  | $ 45,000,000 | 34,655 |  |  |  |
Number of term loans (loan) | loan |  | 2 |  |  |  |  |
Days to enter into interest rate swap (within) |  | 45 days |  |  |  |  |
Required percentage of term loan to be converted to fixed interest rate (at least) |  | 50.00% |  |  |  |  |
THINK | Lines of credit | Term Loan One | Syndicated Facility Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Borrowing under credit facility |  | $ 22,500,000 |  |  |  |  |
Derivatives not designated as hedging instruments: | Contingent redemption features - Series A Preferred Stock |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Fair value of derivative assets |  |  | 28,608 | 42,140 |  |  |
Unrealized gain (loss) on derivatives |  |  | (13,533) |  |  |  |
Derivatives not designated as hedging instruments: | Interest rate swaps | THINK |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  | $ 22,500,000 |
Variable interest converted |  |  |  | 17,327 |  | $ 22,500,000 |
Derivative, fixed interest rate |  |  |  |  |  | 3.86% |
Derivative liability, noncurrent |  |  | 123 | $ 179 |  |  |
Derivatives not designated as hedging instruments: | Foreign Exchange Forward |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Unrealized gain (loss) on derivatives | € | € (9,960,000) |  |  |  |  |  |
Derivative, notional amount | € |  |  |  |  | € 200,000,000 |  |
Number of currency derivatives held (derivative instrument) | swap |  |  |  | 6 | 6 |  |
Derivatives not designated as hedging instruments: | Cross currency and interest rate swaps |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative liability, noncurrent |  |  | 8,130 | $ 7,939 |  |  |
Derivatives not designated as hedging instruments: | Cross currency and interest rate swaps | Chile |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative, notional amount |  |  |  |  |  |  | $ 31,000
Derivative liability, noncurrent |  |  | $ 8,130 | $ 7,939 |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  | 4
Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing December 1, 2024 | Chile |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  | 1
Derivatives not designated as hedging instruments: | Cross Currency Interest Rate Contract, Maturing July 1, 2025 | Chile |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Derivative, number of instruments held (derivative instrument) | swap |  |  |  |  |  |  | 3

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13495-108611 + Details
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- Definition The number of derivative instruments of a particular group held by the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Number of foreign currency exchange rate derivatives held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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